diff options
| author | Trond Myklebust <trond.myklebust@hammerspace.com> | 2021-02-08 16:55:46 +0300 |
|---|---|---|
| committer | Anna Schumaker <Anna.Schumaker@Netapp.com> | 2021-02-08 19:26:14 +0300 |
| commit | fc9dc401899ab280fe1849a0ca5800384726a793 (patch) | |
| tree | dd650add42ee89972be1e8c33ba41470d218373d /fs/nfs/file.c | |
| parent | 37eaeed1a57e92d9db200ba7b4851a09c55eef5a (diff) | |
NFS: Optimise sparse writes past the end of file
If we're doing a write, and the entire page lies beyond the end-of-file,
then we can assume the write can be extended to cover the beginning of
the page, since we know the data in that region will be all zeros.
Signed-off-by: Trond Myklebust <trond.myklebust@hammerspace.com>
Signed-off-by: Anna Schumaker <Anna.Schumaker@Netapp.com>
Diffstat (limited to 'fs/nfs/file.c')
| -rw-r--r-- | fs/nfs/file.c | 4 |
1 files changed, 1 insertions, 3 deletions
diff --git a/fs/nfs/file.c b/fs/nfs/file.c index d02a63af9c15..02795a01c7ef 100644 --- a/fs/nfs/file.c +++ b/fs/nfs/file.c @@ -626,13 +626,11 @@ ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from) /* * O_APPEND implies that we must revalidate the file length. */ - if (iocb->ki_flags & IOCB_APPEND) { + if (iocb->ki_flags & IOCB_APPEND || iocb->ki_pos > i_size_read(inode)) { result = nfs_revalidate_file_size(inode, file); if (result) goto out; } - if (iocb->ki_pos > i_size_read(inode)) - nfs_revalidate_mapping(inode, file->f_mapping); since = filemap_sample_wb_err(file->f_mapping); nfs_start_io_write(inode); |